Our in-house geotechnical laboratory has been accredited by the American Association of State Highway and Transportation Officials (AASHTO) Accreditation Program (AAP) in the fields of soils and Portland cement concrete testing.  This accreditation includes the participation in semi-annual reference sample analysis and bi-annual inspections by AASHTO’s Materials Reference Laboratory and Cement and Concrete Reference Laboratory.  Our laboratory has also been validated by the U.S. Army Corps of Engineers to perform concrete and soils testing for their projects.